I've been deveoping an android app (using ChatGPT - I have no real android development knowledge!) which animates a dog's mouth through the camera feed. I had the app working okay but with some latency between the camera feed and the overlay (using CameraX and a PreviewView), so I tried to update it to an offscreen rendering approach, using an EGL context and MediaCodec surface to render the camera feed plus overlays into a single composited output.
However, the I have not implemented this correclty and the camera feed is just showing a black screen.
Here's ChatGPT's summary of what we had originally (working) and what we changed it to. Both of these approaches are saved on different github branches which you will have access to. You can see the previously working version on the master branch, and the newly updated (not working) version on a test branch.
What We Had Originally - An Android app (Kotlin) using CameraX and a PreviewView to display the live camera feed. - A BoundingBoxOverlay custom View drawn on top for YOLO pose detection (dog’s mouth, eyes, etc.). - We wanted to animate the dog’s mouth in sync with audio but were limited by the traditional overlay.
What We Changed It To Offscreen Rendering Approach: - Created an EGL context and MediaCodec surface (via OffscreenRenderer.kt) to render the camera feed plus overlays into a single composited output. - The camera feed is now provided by a SurfaceTexture created from an external OES texture (rather than using PreviewView). - CameraX is configured to output frames to that SurfaceTexture. - A custom pipeline composites the camera and any overlays (animated mouth, etc.) in OpenGL, then encodes to a video file with MediaCodec.
What We’re Trying to Achieve A Snapchat-like pipeline: - Grab the camera feed directly via a SurfaceTexture (external OES texture). - Apply real-time overlays/filters (like mouth animation, hats, glasses) in OpenGL. - Composite everything offscreen and encode it into a video file (for recording). - Avoid the performance constraints of standard Android Views by relying on OpenGL compositing (similar to Snapchat filters).
Despite these changes, the feed currently displays a black screen. We suspect an issue with the GL pipeline, resolution mismatch, or camera frames not drawing as intended.
Goal: Fix the offscreen renderer so that camera frames plus overlays appear in real time, and video recording also works as expected.
AI CTF Solver Category: AI Agents, AI Chatbot Development, AI Development, AI Model Development, AI Research, Algorithm, Engineering, Machine Learning (ML), Mathematics, Matlab And Mathematica Budget: £250 - £750 GBP
Remote Part-Time Call Support Category: Admin Support, Communications, Copy Editing, Copy Typing, Copywriting, Data Entry, Email Handling, Phone Support, Time Management, Virtual Assistant Budget: ₹100 - ₹400 INR
19-Apr-2026 04:02 GMT
Digital Marketing Strategist for Lead Generation Category: Content Marketing, Digital Marketing, Google Adwords, Internet Marketing, Lead Generation, SEO, Social Media Marketing, YouTube Budget: $250 - $750 USD
19-Apr-2026 04:02 GMT
Admin Layanan Pelanggan Media Sosial -- 2 Category: Content Creation, Customer Service, Customer Support, Data Analysis, Email Marketing, Social Media Management, Telemarketing Budget: $2 - $8 USD
19-Apr-2026 04:00 GMT
Unique Content Creation for Dog Training Website Category: AI Content Creation, AI Writing, Content Development, Content Writing, Copywriting, Internet Marketing, Link Building, SEO Budget: $30 - $250 USD
Rancang Paket Pelatihan SDM Menarik Category: B2B Marketing, Business Consulting, Content Development, Human Resources, Learning Management Systems (LMS), Marketing Strategy, Proposal Writing, Training Development Budget: $15 - $25 USD
19-Apr-2026 03:53 GMT
International Project Manager for Kuddoland Toys Category: Business Plans, Digital Marketing, Graphic Design, HTML, Marketing, Product Development, Project Management, Web Design Budget: min ₹2500 INR
Comprehensive On-Page & Off-Page SEO Category: Analytics, Content Marketing, Content Strategy, Digital Marketing, Internet Marketing, Keyword Research, Link Building, Search Engine Marketing (SEM), SEO, Website Management Budget: ₹12500 - ₹37500 INR
19-Apr-2026 03:45 GMT
Optimasi Penjualan via Instagram & Facebook Category: Content Creation, Data Entry, Digital Marketing, Facebook Marketing, Instagram Marketing, Internet Marketing, SEO, Social Media Marketing Budget: $15 - $25 USD
